Island



(No Model.)

B. H. HADLEY.

EMERY GRINDER.

, N0 261,848. Patented Aug. 1, 1882.

I INVENTElHl a. mans Howl-NWO WW1, n c.

UNITED STATES PATENT OFFICE.

BENJAMIN H. HADLEY, OF PROVIDENCE, RHODE ISLAND.

EiVI ERY-GRINDER.

SPECIFICATION formingpart of Letters Patent No. 261,848, dated August1,. 1882.

Application filed April 5, 1882. (No model.)

To all whom it may concern Be it known that I, BENJAMIN H. HADLEY, ofProvidence, in the State of Rhode Island, have invented an Improvementin Emery- Grinders, of which the following is a specificatiou.

My invention consists in an improvement in thejournal-boxes whereby thedust and loosened emery is prevented from reaching the bearin gs, andalso in improvements in the devices for securing the rest to the bracketofthe grinder-frame, as hereinafter fully set forth.

Figure 1 represents a perspective view of the grinder; and Figs. 2, 3,4, and 5 are detail views, illustrating my improvements.

In the drawings, A represents the table B, the grinder-frame attached tothe table 5 O, the driving-pulley secured to the shaft 1), and E theemery-wheel.

' In operating the set-screw F, which serves to secure the rest G at thedesired elevation in the rest-holder I, Iemploy a wrench, H, so arrangedrelatively to the head f of the screw that when the shank g of the restis held by the point of the screw, as shown in the section, Fig. 4,there will be sufficient room between the head of the screw and thehubt'of the restholder I to allow the wrench to hang vertically from theshank of the screw, and allow the wrench, when in this position, asshown by the dotted lines in the figure, and heldin the same verticalplane, to be turned over and over around the screw without acting toturn the screw in either direction and the head of the screw is soconstructed that the wrench, when brought outward upon the head, will beprevented from outward removal therefrom, and will be retained in properposition for turning the screw in either direction, as desired. Theadvantages of this improvement are that the wrench cannot be lost ormisplaced, and is always in position for ready use, and at'terit hasbeen used upon the head of the screw may be passed to "a pendentposition on the shank of the screw, so as to be wholly outot' the wayand free from accident. The enlargement which serves to retain thewrench from outward removal from the head of the screw may be producedin avariety of ways-as, forinstance, the

head of the screw may be made in the form of a truncated pyramid, theouter portion of the head being its base, the wrench beingcorrespondingly constructed to fit the head, or a shoulder may be formedupon the head, as shown in the drawings, or even a pin passed through anelongated head to prevent the outward movement of the wrench may beemployed.

The rest-holder I is secured to the slotted bracket J of thegrinder-frame by means of the nut K, provided with a downward -turuedflange, k, in which are cut the notches j at regular intervals.

Upon the lower end of the holding-screw L is loosely fitted a collar, M,held between a shoulder upon the screw and the nut m, and to the collarM is pivoted the hand-lever N, as shown in Fig. 3. The hand-lever maythus be carried to any desired point around the screw, and when not inuse "will drop to a pendent position, as shown in Fig. 1, and by thedotted lines in Fig. 2. J

To use the hand-lever N for the purpose of tightening or loosening thenut K the lever is to be brought from its normal pendent position to aposition in which its shank n will be made to occupy one of the notchesj in the flange of the nut, as shown in Figs. 1 and 2. The nut may nowbe turned by means of the lever to a convenient extent, and the levermay be then depressed, so as to pass outof thenotch of the nut and bebrought back and elevated into another of the notches, and thisoperation may be continuouslyrepeated until the desired movement of thenut is effected,and my abovedescribed improvement providesconvenientlyoperated powerful means for securin g the restholder firmlyto the bracket in any required position.

The water-cup O, necessarily employed in connection with anemery-grinder when grinding tempered tools, is held by an arm, P,pivoted under the table A, so that when not in use the water-cup may beswung back under the table A, and be there protected from accident andfrom grinding dust or emery, which tends in a short time to foul thewater in the cup and render it undesirable for use, and the describedmethod of supporting the cup for convenient accessibility and protectionwhen not in use is a highly desirable improvement in emery-giinders,tending to cleanliness in the use of such machines.

In order to still further improve the machine by preventing theemery-dust from reaching the surface of the journal-bearings d of theshaft D, I provide a recess, 1', at the back of the fixed collar Q, asshown in Fig. 5, to receive the outer end of the journal-box R, and atthe inner end of the journal-box I provide a recessed collar, S, heldupon the shaft by means ofa set-screw, and within the hollowed end ofthe pulley G, and I also provide a circumferential groove or depression,T, around the ends of the journal-box in line with the projectingflanges of the collars Q and S, which grooves, in conjunction with therecesses ofthe collars, serve to prevent the entrance of the finegrinding-dust at the ends of thejournalboxes so asto reach thebearing-surfaces of the journals. Theendwearofthejournal-box may bereedily taken up by moving the collar S as required.

I claim as my'invention 1. In an emery-grinder, the combination of thejournal-box, provided with the circumferential grooves, with therecessed collars, one made fixed upon the shaft and the other mademovable thereon, substantially as and. for the purpose specified.

2. In an emery-grinder, the combination of the rest-holder andrest-holding bracket with the fastening-bolt, the pivoted lever looselysecured to the bolt, and the notched nut, substantially as described.

3. In an emery-grinder, the combination of the rest-holder andrest-holding bracket, the pivoted lever loosely secured to thefasteningbolt, and the notched nut, with the rest, the

rest-holding screw, and the loose pendent 4o wrench, all arrangedsubstantially as described.

BENJAMIN H. HADLEY.

VVituesses:

SooRATEs SOHOLFIELD, HARMON S. BABCOOK.

